Question on: JAMB Mathematics - 2009
What value of s will make the function x(4-x) a maximum
A
4
B
3
C
2
D
1
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Correct Option: C
x(4-x) = 4x-x2
dy/dx = 4-2x
As dy/dx = 0
4-2x = 0
2x = 4
x = 2
dy/dx = 4-2x
As dy/dx = 0
4-2x = 0
2x = 4
x = 2
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